/Engine/Plugins/Animation/IKRig/Source/IKRig/Public/Rig/IKRigProcessor.h
This is the general sequence of function calls to run a typical IK solve:Set all bone transforms in global space. This is the pose the IK solve will start from
void SetInputPoseGlobal ( const [TArray](API\Runtime\Core\Containers\TArray)< FTransform > & InGlobalBoneTransforms )